Chapter 17: Interpreting the Electrocardiogram

Chapter 17: Interpreting the Electrocardiogram

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. The electrocardiogram (ECG) is primarily used to evaluate the patient with symptoms suggestive of acute myocardial disease.

ANS:  A

The ECG is used primarily to evaluate the patient with an acute clinical condition suggestive of myocardial disease.

DIF:    Recall             REF:   p. 368            OBJ:   1

2. Your patient has a normal ECG reading. What does this finding tell you about the patient’s likelihood of having a myocardial infarction in the immediate future?

ANS:  D

The resting ECG has no value as a predictor of future heart attacks.

DIF:    Application    REF:   p. 368            OBJ:   1

3. Valvular defects in the heart can be detected with a 12-lead ECG.

ANS:  B

Certain abnormalities, such as valvular defects, cannot be identified directly by the ECG.

DIF:    Recall             REF:   p. 368            OBJ:   1

4. What term is used to define the ability of certain cardiac cells to depolarize without stimulation?

ANS:  A

The ability of these cells to depolarize without stimulations is known as automaticity.

DIF:    Recall             REF:   p. 369            OBJ:   2

5. What structure normally paces the healthy heart?

ANS:  B

Normally, the SA node, which is located in the upper portion of the right atrium, has the greatest degree of automaticity and therefore paces the heart.

DIF:    Recall             REF:   p. 369            OBJ:   3